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| <p>You are viewing the documentation for a prerelease version.</p> |
| </div> |
| <div class="article-header"> |
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| <ul> |
| <li class="crumb"><a href="../../../../index.html">Cassandra</a></li> |
| <li class="crumb"><a href="sstablepartitions.html">sstablepartitions</a></li> |
| </ul> |
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| <div class="tools" role="navigation"> |
| <ul> |
| <li class="tool edit"><a href="https://github.com/apache/cassandra/edit/trunk/doc/modules/cassandra/pages/managing/tools/sstable/sstablepartitions.adoc" title="Edit Page" target="_blank" rel="noopener">Edit</a></li> |
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| </div> |
| <article class="doc"> |
| <h1 class="page">sstablepartitions</h1> |
| <div id="preamble"> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Identifies large partitions of SSTables and outputs the partition size in bytes, row count, cell count, and tombstone count.</p> |
| </div> |
| <div class="paragraph"> |
| <p>You can supply any number of sstables file paths, or directories containing sstables. Each sstable will be analyzed separately.</p> |
| </div> |
| <div class="paragraph"> |
| <p>If a metrics threshold such as <code>--min-size</code>, <code>--min-rows</code>, <code>--min-cells</code> or <code>--min-tombstones</code> is provided, |
| then the partition keys exceeding of the threshold will be printed in the output. |
| It also prints a summary of metrics for the table. The percentiles in the metrics are estimates, |
| while the min/max/count metrics are accurate.</p> |
| </div> |
| <div class="paragraph"> |
| <p>The default output of this tool is meant to be read by human eyes. |
| Future versions might include small formatting changes or present new data that can fool scripts reading it. |
| Scripts or other automatic tools should use the <code>--csv</code> flag to produce machine-readable output. |
| Future versions will not change the format of the CSV output except for maybe adding new columns, |
| so a proper CSV parser consuming the output should keep working.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Cassandra doesn’t need to be running before this tool is executed.</p> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="usage"><a class="anchor" href="#usage"></a>Usage</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>sstablepartitions <options> <sstable files or directories></p> |
| </div> |
| <table class="tableblock frame-all grid-all stretch"> |
| <colgroup> |
| <col style="width: 50%;"> |
| <col style="width: 50%;"> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">-t, --min-size <arg></p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Partition size threshold, expressed as either the number of bytes or a size with unit of the form 10KiB, 20MiB, 30GiB, etc.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">-w, --min-rows <arg></p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Partition row count threshold.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">-c, --min-cells <arg></p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Partition cell count threshold</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">-o, --min-tombstones <arg></p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Partition tombstone count threshold.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">-k, --key <arg></p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Partition keys to include, instead of scanning all partitions.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">-x, --exclude-key <arg></p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Partition keys to exclude.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">-r, --recursive</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Scan for sstables recursively</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">-b, --backups</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Include backups present in data directories when scanning directories</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">-s, --snaphsots</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Include snapshots present in data directories when scanning directories</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">-u, --current-timestamp <arg></p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Timestamp (seconds since epoch, unit time) for TTL expired calculation.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">-y, --partitions-only</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Only brief partition information. Exclude per-partition detailed row/cell/tombstone information from process and output.</p></td> |
| </tr> |
| <tr> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">-m, --csv</p></td> |
| <td class="tableblock halign-left valign-top"><p class="tableblock">Produced CSV output (machine readable)</p></td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="examples"><a class="anchor" href="#examples"></a>Examples</h2> |
| <div class="sectionbody"> |
| <div class="sect2"> |
| <h3 id="analyze-partition-statistics-for-a-single-sstable"><a class="anchor" href="#analyze-partition-statistics-for-a-single-sstable"></a>Analyze partition statistics for a single SSTable</h3> |
| <div class="paragraph"> |
| <p>Use the path to the SSTable file as the only argument.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Example:</p> |
| </div> |
| <div class="literalblock"> |
| <div class="content"> |
| <pre>sstablepartitions data/data/k/t-d7be5e90e90111ed8b54efe3c39cb0bb/oa-8-big-Data.db |
| |
| Processing k.t-d7be5e90e90111ed8b54efe3c39cb0bb #8 (big-oa) (1.368 GiB uncompressed, 534.979 MiB on disk) |
| Partition size Row count Cell count Tombstone count |
| ~p50 767.519 KiB 770 1916 0 |
| ~p75 2.238 MiB 2299 5722 0 |
| ~p90 3.867 MiB 3311 9887 50 |
| ~p95 16.629 MiB 14237 42510 446 |
| ~p99 148.267 MiB 126934 379022 1331 |
| ~p999 368.936 MiB 315852 943127 2759 |
| min 56.854 KiB 100 150 0 |
| max 356.067 MiB 310706 932118 2450 |
| count 210</pre> |
| </div> |
| </div> |
| </div> |
| <div class="sect2"> |
| <h3 id="analyze-partition-statistics-for-all-sstables-in-a-directory"><a class="anchor" href="#analyze-partition-statistics-for-all-sstables-in-a-directory"></a>Analyze partition statistics for all SSTables in a directory</h3> |
| <div class="paragraph"> |
| <p>Use the path to the SSTables directory as the only argument.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Example:</p> |
| </div> |
| <div class="literalblock"> |
| <div class="content"> |
| <pre>sstablepartitions data/data/k/t-d7be5e90e90111ed8b54efe3c39cb0bb |
| |
| Processing k.t-d7be5e90e90111ed8b54efe3c39cb0bb #8 (big-oa) (1.368 GiB uncompressed, 534.979 MiB on disk) |
| Partition size Row count Cell count Tombstone count |
| ~p50 767.519 KiB 770 1916 0 |
| ~p75 2.238 MiB 2299 5722 0 |
| ~p90 3.867 MiB 3311 9887 50 |
| ~p95 16.629 MiB 14237 42510 446 |
| ~p99 148.267 MiB 126934 379022 1331 |
| ~p999 368.936 MiB 315852 943127 2759 |
| min 56.854 KiB 100 150 0 |
| max 356.067 MiB 310706 932118 2450 |
| count 210 |
| |
| Processing k.t-d7be5e90e90111ed8b54efe3c39cb0bb #9 (big-oa) (457.540 MiB uncompressed, 174.880 MiB on disk) |
| Partition size Row count Cell count Tombstone count |
| ~p50 1.865 MiB 1597 4768 0 |
| ~p75 13.858 MiB 14237 42510 0 |
| ~p90 28.735 MiB 29521 73457 50 |
| ~p95 34.482 MiB 29521 88148 8239 |
| ~p99 49.654 MiB 42510 126934 14237 |
| ~p999 49.654 MiB 42510 126934 14237 |
| min 47.272 KiB 100 150 0 |
| max 45.133 MiB 39429 118287 13030 |
| count 57</pre> |
| </div> |
| </div> |
| </div> |
| <div class="sect2"> |
| <h3 id="output-only-partitions-over-100mib-in-size"><a class="anchor" href="#output-only-partitions-over-100mib-in-size"></a>Output only partitions over 100MiB in size</h3> |
| <div class="paragraph"> |
| <p>Use the <code>--min-size</code> option to specify the minimum size a partition must have to be included in the output.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Example:</p> |
| </div> |
| <div class="literalblock"> |
| <div class="content"> |
| <pre>sstablepartitions data/data/k/t-d7be5e90e90111ed8b54efe3c39cb0bb/oa-8-big-Data.db --min-size 100MiB |
| |
| Processing k.t-d7be5e90e90111ed8b54efe3c39cb0bb #8 (big-oa) (1.368 GiB uncompressed, 534.979 MiB on disk) |
| Partition: '13' (0000000d) live, size: 105.056 MiB, rows: 91490, cells: 274470, tombstones: 50 (row:50, range:0, complex:0, cell:0, row-TTLd:0, cell-TTLd:0) |
| Partition: '1' (00000001) live, size: 127.241 MiB, rows: 111065, cells: 333195, tombstones: 50 (row:50, range:0, complex:0, cell:0, row-TTLd:0, cell-TTLd:0) |
| Partition: '8' (00000008) live, size: 356.067 MiB, rows: 310706, cells: 932118, tombstones: 0 (row:0, range:0, complex:0, cell:0, row-TTLd:0, cell-TTLd:0) |
| Partition: '2' (00000002) live, size: 213.341 MiB, rows: 186582, cells: 559125, tombstones: 978 (row:978, range:0, complex:0, cell:0, row-TTLd:0, cell-TTLd:0) |
| Summary of k.t-d7be5e90e90111ed8b54efe3c39cb0bb #8 (big-oa): |
| File: /Users/adelapena/src/cassandra/trunk/data/data/k/t-d7be5e90e90111ed8b54efe3c39cb0bb/oa-8-big-Data.db |
| 4 partitions match |
| Keys: 13 1 8 2 |
| Partition size Row count Cell count Tombstone count |
| ~p50 767.519 KiB 770 1916 0 |
| ~p75 2.238 MiB 2299 5722 0 |
| ~p90 3.867 MiB 3311 9887 50 |
| ~p95 16.629 MiB 14237 42510 446 |
| ~p99 148.267 MiB 126934 379022 1331 |
| ~p999 368.936 MiB 315852 943127 2759 |
| min 56.854 KiB 100 150 0 |
| max 356.067 MiB 310706 932118 2450 |
| count 210</pre> |
| </div> |
| </div> |
| </div> |
| <div class="sect2"> |
| <h3 id="output-only-partitions-with-more-than-1000-tombstones"><a class="anchor" href="#output-only-partitions-with-more-than-1000-tombstones"></a>Output only partitions with more than 1000 tombstones</h3> |
| <div class="paragraph"> |
| <p>Use the <code>--min-tombstones</code> option to specify the minimum number of tombstones a partition must have to be included in the output.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Example:</p> |
| </div> |
| <div class="literalblock"> |
| <div class="content"> |
| <pre>sstablepartitions data/data/k/t-d7be5e90e90111ed8b54efe3c39cb0bb/oa-8-big-Data.db --min-tombstones 1000 |
| |
| Processing k.t-d7be5e90e90111ed8b54efe3c39cb0bb #8 (big-oa) (1.368 GiB uncompressed, 534.979 MiB on disk) |
| Partition: '55' (00000037) live, size: 1.290 MiB, rows: 2317, cells: 3474, tombstones: 1159 (row:1159, range:0, complex:0, cell:0, row-TTLd:0, cell-TTLd:0) |
| Partition: '28' (0000001c) live, size: 1.198 MiB, rows: 2099, cells: 3147, tombstones: 1050 (row:1050, range:0, complex:0, cell:0, row-TTLd:0, cell-TTLd:0) |
| Partition: '89' (00000059) live, size: 1.346 MiB, rows: 2226, cells: 3339, tombstones: 1113 (row:1113, range:0, complex:0, cell:0, row-TTLd:0, cell-TTLd:0) |
| Partition: '21' (00000015) live, size: 3.853 MiB, rows: 4900, cells: 9927, tombstones: 2450 (row:2450, range:0, complex:0, cell:0, row-TTLd:0, cell-TTLd:0) |
| Summary of k.t-d7be5e90e90111ed8b54efe3c39cb0bb #8 (big-oa): |
| File: /Users/adelapena/src/cassandra/trunk/data/data/k/t-d7be5e90e90111ed8b54efe3c39cb0bb/oa-8-big-Data.db |
| 4 partitions match |
| Keys: 55 28 89 21 |
| Partition size Row count Cell count Tombstone count |
| ~p50 767.519 KiB 770 1916 0 |
| ~p75 2.238 MiB 2299 5722 0 |
| ~p90 3.867 MiB 3311 9887 50 |
| ~p95 16.629 MiB 14237 42510 446 |
| ~p99 148.267 MiB 126934 379022 1331 |
| ~p999 368.936 MiB 315852 943127 2759 |
| min 56.854 KiB 100 150 0 |
| max 356.067 MiB 310706 932118 2450 |
| count 210</pre> |
| </div> |
| </div> |
| </div> |
| <div class="sect2"> |
| <h3 id="output-csv-machine-readable-output"><a class="anchor" href="#output-csv-machine-readable-output"></a>Output CSV machine-readable output</h3> |
| <div class="paragraph"> |
| <p>Use the <code>--csv</code> option to output a CSV machine-readable output, combined with any threshold value.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Example:</p> |
| </div> |
| <div class="literalblock"> |
| <div class="content"> |
| <pre>sstablepartitions data/data/k/t-d7be5e90e90111ed8b54efe3c39cb0bb/oa-8-big-Data.db --min-size 100MiB --csv |
| key,keyBinary,live,offset,size,rowCount,cellCount,tombstoneCount,rowTombstoneCount,rangeTombstoneCount,complexTombstoneCount,cellTombstoneCount,rowTtlExpired,cellTtlExpired,directory,keyspace,table,index,snapshot,backup,generation,format,version |
| "13",0000000d,true,186403543,110158965,91490,274470,50,50,0,0,0,0,0,/Users/adelapena/src/cassandra/trunk/data/data/k/t-d7be5e90e90111ed8b54efe3c39cb0bb/oa-8-big-Data.db,k,t,,,,8,big,oa |
| "1",00000001,true,325141542,133422183,111065,333195,50,50,0,0,0,0,0,/Users/adelapena/src/cassandra/trunk/data/data/k/t-d7be5e90e90111ed8b54efe3c39cb0bb/oa-8-big-Data.db,k,t,,,,8,big,oa |
| "8",00000008,true,477133752,373362819,310706,932118,0,0,0,0,0,0,0,/Users/adelapena/src/cassandra/trunk/data/data/k/t-d7be5e90e90111ed8b54efe3c39cb0bb/oa-8-big-Data.db,k,t,,,,8,big,oa |
| "2",00000002,true,851841363,223704192,186582,559125,978,978,0,0,0,0,0,/Users/adelapena/src/cassandra/trunk/data/data/k/t-d7be5e90e90111ed8b54efe3c39cb0bb/oa-8-big-Data.db,k,t,,,,8,big,oa</pre> |
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